彩钢板涂层缺陷有哪几种

(1)色差:

1)彩钢板涂料本身存在较大色差。应立即更换涂料品种;

2)彩钢板涂料膜厚控制不当引起涂层色差。要及时调整膜厚，消除色差;

3)PMT 控制不当引起涂层色差。要及时调整炉温，应尽可能地按照涂料厂家提供的 PMT 调整范围调整控制;网用是说一断
4)烘烤时间与炉内空气速度控制不当也会引起涂层色差。要及时调整生产工艺速度和调整炉内空气进、出流量平衡。
(2)硬块或麻点: 来小大沙屏遣然现财更规一出当学加零各内大新 :普
1)基板粗糙或基板缺陷引起的，这时只有更换基板;

2)涂装前，涂料受到污染影响涂层表面，这时要及时更换涂料或过滤涂料;

3)彩钢板涂料表面时机室内空气4)炉内酸气太重引起涂料硬化，这时要及时调整炉温;中木
5)内气胜，层表，需要机洗6)冷过
(3)高速涂层时出现点状式的“失膜”:
1)PMT 控制不当引起涂层“失膜”，这时要及时调整炉温;
2)辊速比不四配，这时要及时调整辊速比;工,更講外其于由样的 :著
3)涂敷辊存在缺陷，这时要及时更换完好涂装辊;
4)涂料黏度不当引起涂层“失膜”，这时要及时调整涂料黏度。”,樂润定
(4)高速或低速涂层时出现线状“失膜”“验领族大成南厨前间微直和常钟用1)辊速比不匹配，这时要及时调整辊速比;最子量用聘明
2)涂敷辊存在缺陷，这时要及时更换完好涂敷辊。(5)钢带两边缘涂层厚度不一样:-齐回只
原因是涂敷辊与粘料辊之间辊缝两端不均匀，这时只有停机调整两端辊缝平衡。意(6)湿涂层表面发现横向条纹即“抬头纹”
1)基板镀锌层横向条纹带来引起的;
(1) Color difference:
1) There is a large color difference in the coating itself. The type of coating should be changed immediately;
2) Improper control of film thickness causes color difference of coating. Adjust the film thickness in time to eliminate the color difference;
3) The coating color difference is caused by improper PMT control. To adjust the furnace temperature in time, it should be adjusted and controlled according to the PMT adjustment range provided by the coating manufacturer as far as possible
4) Improper control of baking time and air speed in the furnace will also cause color difference of coating. It is necessary to timely adjust the production process speed and adjust the balance of air flow in and out of the furnace.
(2) Hard block or pockmarked spot: come to the small and big sand screen to find out the wealth
1) If the substrate is rough or defective, the substrate must be replaced;
2) Before coating, if the coating is polluted and the coating surface is affected, the coating or filter coating shall be replaced in time;
3) 4) too heavy acid gas in the furnace causes the coating to harden, so the furnace temperature should be adjusted in time
5) The inner gas is better than the outer layer. It needs machine washing. 6) supercooling
(3) In high speed coating, there is a point like "film loss":
1) If the coating "loses film" due to improper PMT control, the furnace temperature should be adjusted in time;
2) Roll speed ratio is not four match, then it is necessary to adjust the roll speed ratio in time; work, more importantly, it depends on the type: work
3) If the coating roller has defects, it should be replaced in time;
4) Improper viscosity of coating will cause coating "loss of film". At this time, the viscosity of coating should be adjusted in time , lerunding
(4) When coating at high speed or low speed, linear "film loss" occurs. 1) the roll speed ratio does not match between the front room of Dacheng South kitchen and the front room of Changzhong. In this case, the roll speed ratio should be adjusted in time
2) If the coating roller has defects, it should be replaced in time. (5) The coating thickness of two edges of the steel strip is not the same
The reason is that both ends of the gap between the coating roll and the sticking roll are not uniform. At this time, we have to stop the machine to adjust the gap balance. (6) horizontal stripes are found on the surface of wet coating
1) It is caused by the transverse stripe of zinc coating on the substrate;